Lab Stool rests on a 24"-diameter, cast-aluminum base. Wall saver tips on the base protect against scuff marks and offer a textured surface for foot-grip. Or choose a black composite base for a more contemporary look. Sit in comfort on a 16"-diameter, vinyl-upholstered seat with 3"-thick polyfoam padding. On 2", twin-wheel, hooded casters. Choose from a wide variety of upholstery colors.